als-sensor.c

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/*
 * Copyright (c) 2016, University of Bristol - http://www.bris.ac.uk/
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/*---------------------------------------------------------------------------*/
/**
 * \addtogroup srf06-common-peripherals
 * @{
 *
 * \file
 *  Driver for the SmartRF06EB ALS when a CC13xx/CC26xxEM is mounted on it
 */
/*---------------------------------------------------------------------------*/
#include "contiki.h"
#include "lib/sensors.h"
#include "srf06/als-sensor.h"
#include "sys/timer.h"
#include "dev/adc-sensor.h"
#include "dev/aux-ctrl.h"
 
#include "ti-lib.h"
 
#include <stdint.h>
/*---------------------------------------------------------------------------*/
static aux_consumer_module_t als_aux = {
  .clocks = AUX_WUC_ADI_CLOCK | AUX_WUC_ANAIF_CLOCK | AUX_WUC_SMPH_CLOCK
};
/*---------------------------------------------------------------------------*/
static int
config(int type, int enable)
{
  switch(type) {
  case SENSORS_HW_INIT:
    ti_lib_ioc_pin_type_gpio_output(BOARD_IOID_ALS_PWR);
    break;
  case SENSORS_ACTIVE:
    ti_lib_ioc_pin_type_gpio_output(BOARD_IOID_ALS_PWR);
    ti_lib_ioc_port_configure_set(BOARD_IOID_ALS_OUT, IOC_PORT_GPIO,
                                  IOC_STD_OUTPUT);
    ti_lib_ioc_pin_type_gpio_input(BOARD_IOID_ALS_OUT);
 
    if(enable) {
      ti_lib_gpio_set_dio(BOARD_IOID_ALS_PWR);
      aux_ctrl_register_consumer(&als_aux);
      ti_lib_aux_adc_select_input(ADC_COMPB_IN_AUXIO7);
      clock_delay_usec(2000);
    } else {
      ti_lib_gpio_clear_dio(BOARD_IOID_ALS_PWR);
      aux_ctrl_unregister_consumer(&als_aux);
    }
    break;
  default:
    break;
  }
  return 1;
}
/*---------------------------------------------------------------------------*/
static int
value(int type)
{
  int val;
 
  ti_lib_aux_adc_enable_sync(AUXADC_REF_VDDS_REL, AUXADC_SAMPLE_TIME_2P7_US,
                             AUXADC_TRIGGER_MANUAL);
  ti_lib_aux_adc_gen_manual_trigger();
  val = ti_lib_aux_adc_read_fifo();
  ti_lib_aux_adc_disable();
 
  return val;
}
/*---------------------------------------------------------------------------*/
static int
status(int type)
{
  return 1;
}
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(als_sensor, ALS_SENSOR, value, config, status);
/*---------------------------------------------------------------------------*/
/** @} */